EP 0785530 A1 19970723 - Method for extracting both edges of the road by propagation of active contours
Title (en)
Method for extracting both edges of the road by propagation of active contours
Title (de)
Verfahren zur Gewinnung beider Strassenränder durch aktive Kontur-Ausbreitung
Title (fr)
Procédé d'extraction des deux bords d'une route par propagation de contour actif
Publication
Application
Priority
FR 9600424 A 19960116
Abstract (en)
The method for extracting the contour of an object (1) having two lateral edges (10,11) from a digital photographic image uses an automatic process of active contour propagation and includes the following stages. An input (30), a first (CS1) and a second (CS2) initial contour situated in proximity to one or the other edges of the object in the image. The first initial contour (32) is propagated with the aid of the active contour propagation process and the second initial contour (33) with the aid of a second active contour propagation process, using for each process: a) an energy model including a term (Ecoupl) relative the elastic coupling forces (F, T) between the points matched with the first and second initial contours; and b) a prolongation direction (Dp) of the defined active contour as being an average direction with respect to two prolongation directions (D1,D2) respectively determined for the first and second active contours.
Abstract (fr)
Selon ce procédé, on entre un premier (CS1) et un second (CS2) contour initial se situant respectivement à proximité de l'un et de l'autre bord de la route à extraire d'une image numérisée. On propage le premier contour initial à l'aide d'un premier processus automatique de propagation de contour actif (32) et le second contour initial à l'aide d'un second processus de propagation de contour actif (33). Chaque processus de propagation utilise, d'une part, un modèle d'énergie incluant un terme (Ecoupl) relatif à des forces élastiques de couplage (F,T) entre des points appariés du premier et du second contour initial et, d'autre part, une direction de prolongation (Dp) définie comme étant une direction moyenne par rapport à deux directions de prolongation déterminées respectivement pour le premier et le second contour actif. <IMAGE>
IPC 1-7
IPC 8 full level
G01B 11/00 (2006.01); B60W 30/00 (2006.01); G06K 9/00 (2006.01); G06K 9/64 (2006.01); G06T 1/00 (2006.01); G06T 5/00 (2006.01); G06T 7/60 (2006.01); G08G 1/16 (2006.01)
CPC (source: EP US)
G06T 7/12 (2016.12 - EP US); G06T 7/149 (2016.12 - EP US); G06V 10/755 (2022.01 - EP US); G06V 20/588 (2022.01 - EP US); G06T 2207/30256 (2013.01 - EP US)
Citation (search report)
- [X] US 4906940 A 19900306 - GREENE ROBERT R [US], et al
- [A] EP 0626655 A2 19941130 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [A] FUA P ET AL: "Model driven edge detection", MACHINE VISION AND APPLICATIONS, WINTER 1990, USA, vol. 3, no. 1, ISSN 0932-8092, pages 45 - 56, XP000602820
Designated contracting state (EPC)
DE FI GB NL SE
DOCDB simple family (publication)
EP 0785530 A1 19970723; FR 2743650 A1 19970718; FR 2743650 B1 19980206; JP 2940865 B2 19990825; JP H09311943 A 19971202; US 5832116 A 19981103
DOCDB simple family (application)
EP 97400052 A 19970113; FR 9600424 A 19960116; JP 582097 A 19970116; US 78267097 A 19970115